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46955

Sigma-Aldrich

Fluorescein

for fluorescence, free acid

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Synonym(s):
Acid Yellow 73
Empirical Formula (Hill Notation):
C20H12O5
CAS Number:
Molecular Weight:
332.31
Colour Index Number:
45350
Beilstein:
94324
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.32

grade

for fluorescence

Quality Level

technique(s)

titration: suitable

fluorescence

λex 490 nm; λem 514 nm in 0.1 M Tris pH 8.0

suitability

suitable for fluorescence

SMILES string

Oc1ccc2c(Oc3cc(O)ccc3C24OC(=O)c5ccccc45)c1

InChI

1S/C20H12O5/c21-11-5-7-15-17(9-11)24-18-10-12(22)6-8-16(18)20(15)14-4-2-1-3-13(14)19(23)25-20/h1-10,21-22H

InChI key

GNBHRKFJIUUOQI-UHFFFAOYSA-N

Gene Information

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This Item
46960F6377F7250
Fluorescein for fluorescence, free acid

Sigma-Aldrich

46955

Fluorescein

technique(s)

titration: suitable

technique(s)

titration: suitable

technique(s)

-

technique(s)

-

fluorescence

λex 490 nm; λem 514 nm in 0.1 M Tris pH 8.0

fluorescence

λex 460 nm; λem 515 nm(lit.), λex 490 nm; λem 514 nm in 0.1 M Tris pH 8.0

fluorescence

λex 460 nm; λem 515 nm(lit.)

fluorescence

λex 492 nm; λem 518 nm (green)

suitability

suitable for fluorescence

suitability

suitable for fluorescence

suitability

-

suitability

-

Quality Level

100

Quality Level

-

Quality Level

200

Quality Level

-

Gene Information

human ... PTPN1(5770), PTPRF(5792)

Gene Information

-

Gene Information

-

Gene Information

-

General description

Fluorescein dye is the most commonly used fluorescent probe. It is used to stain epithelial defects and analyse the integrity of corneal epithelium. Fluorescein is used in the diagnosis of corneal perforation. Oral or intravenous fluorescein is used in fluorescein angiography to detect diabetic retinopathy and choroidal neovascular membrane.

Application

Fluorescein has been used:
  • in the permeability assay of Caco-2 cells
  • to test its suitability to serve as lifetime fluorescence standards
  • as a fluorophore for the fast recovery of fluorescence peaks and fluorophore concentration in the presence of hemoglobin
  • as a fluorescent probe in oxygen radical absorbance capacity (ORAC) assay

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Eye Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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25G
Pack Size/Quantity

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1000309185

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. What is Product 46955, Fluorescein, soluble in?

    According to the chemicals encyclopedia published by the Royal Society of Chemistry : 13th Edition, Fluorescein is soluble in hot alcohol and glacial acetic acid. Also, it is soluble in alkali hydroxides or carbonates. This product is insoluble in water, benzene, chloroform and ether.

  4. How should Product 46955, Fluorescein, be stored?

    We recommend storing this product at room temperature.

  5. What is the dye content of Product 46955, Fluorescein?

    According to our supplier, the dye content of pure Fluorescein is a minimum of 90%. We do not test the purity of this product since it is not one of our specifications.

  6. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  7. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Ocular health assessment
Prokopich CL, et al.
Clinical Pediatric Nephrology, Second Edition, 221-318 (2007)
Absorption and fluorescence properties of fluorescein
Sjoback R, et al.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, 51(6), L7-L21 (1995)
Rapid measurement of total antioxidant capacity in plants
Gillespie KM, et al.
Nature Protocols, 2(4), 867-867 (2007)
Experimental recovery of intrinsic fluorescence and fluorophore concentration in the presence of hemoglobin: spectral effect of scattering and absorption on fluorescence
Du Le VN, et al.
Journal of Biomedical Optics, 20(12), 127003-127003 (2015)
Microfluidic gut-on-a-chip with three-dimensional villi structure
Shim KY, et al.
Biomedical Microdevices, 19(2), 37-37 (2017)

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